From Sylvia Plummer, March 8, 2015
There will be six (6) 50 feet high Ventilation Structures in Pasadena, two locations are under consideration. The pages below are from the SR-710 Draft EIR/EIS. The first page is a visual of the six ventilation structures on Colorado Blvd, next to Old Pasadena. (comes from Volume 1) The second and third pages give a description (Box 30-FWY from Volume 2). According to Metro the Ventilation structures would be a memorable visual element and improve the look for this entrance into Old Pasadena . There was no other visual provided for the second location, which would be near the SR-710/SR134 interchange.
The pages from the Draft EIR are below--see also http://www.slideshare.net/peggydrouet/pasadena-45591875